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Chebyshev Type II filter design

`[`

designs
a lowpass, highpass, bandpass, or bandstop Chebyshev Type II
filter, depending on the value of `b,a`

] = cheby2(`n`

,`Rs`

,`Ws`

,`ftype`

)`ftype`

and the
number of elements of `Ws`

. The resulting bandpass
and bandstop designs are of order 2`n`

.

**Note:** See Limitations for information about numerical issues that affect
forming the transfer function.

`[`

designs
a lowpass, highpass, bandpass, or bandstop digital Chebyshev Type II filter and returns its zeros, poles, and gain. This
syntax can include any of the input arguments in previous syntaxes.`z,p,k`

] = cheby2(___)

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